Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities
Net loss	$ (18,088)	$ (15,482)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,533	$ 1,239
Intangible asset impairment charge	385
Share-based compensation expense	2,582	$ 1,759
Change in fair value of contingent purchase price consideration	$ 148	38
Loss on change in fair value of warrants		22
Changes in operating assets and liabilities, net of acquisition:
Accounts receivable, net	$ (721)	(480)
Inventory	(162)	(1,112)
Prepaid expenses and other assets	12	115
Accounts payable	770	290
Accrued liabilities	922	(751)
Deferred income	(258)	191
Net cash used in operating activities	(12,877)	(14,171)
Cash flows from investing activities
Purchases of property and equipment	(2,466)	(2,567)
Purchases of intangible assets	$ (45)	(17)
Cash paid for acquisition, net of cash acquired		(1,716)
Decrease in restricted cash	$ 200	57
Net cash used in investing activities	(2,311)	$ (4,243)
Cash flows from financing activities
Proceeds from issuance of ordinary shares	53,762
Proceeds from exercise of share options and warrants	14	$ 13
Payments on loan	(107)	(139)
Net cash provided by (used in) financing activities	53,669	(126)
Effect of exchange rate changes on cash and cash equivalents	(163)	53
Net increase (decrease) in cash and cash equivalents, excluding restricted cash	38,318	(18,487)
Cash and cash equivalents at beginning of period	50,165	76,494
Cash and cash equivalents at end of period	$ 88,483	58,007
Noncash investing and financing activities:
Warrants liability reclassified to additional paid-in capital upon exercise of warrants		$ 318